The pain in the muscles of the lower arm after playing badminton is mainly caused by muscle strain of the limb after strenuous exercise, and the main treatment for this kind of pain can be divided into the following steps. 1, before the intense exercise to carry out appropriate warm-up activities. 2, if the pain in the muscles of the limb after strenuous exercise, you can carry out symptomatic swelling and pain relief. The swelling is usually reduced by applying cold compresses within 24 or 48 hours after exercise, followed by appropriate hot compresses. In the acute stage, you can use Yunnan Baiyun Baiyao spray to reduce swelling and pain, and if you have pain on the outside of the elbow joint, you can use physical therapy or local closure.